Many of the nation's stargazers were treated to a celestial show Wednesday night with the appearance of a "super blue blood moon," a phenomenon caused by the rare confluence of three lunar events.
According to NASA, which called the event a "lunar trifecta," a supermoon appears larger and brighter than usual when the moon is near its perigee, or closest point to Earth during its orbit. A second full moon in a month is known as a blue moon, which occurs approximately every three years. A blood moon refers to the lunar body's reddish tint as the Earth passes between the moon and the sun in an eclipse.
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